<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
  <meta charset="UTF-8">
  <title>hello world!</title>
</head>
<body>
    <h1 th:inline="text">Hello [[${#httpServletRequest.remoteUser}]]</h1>
    <form th:action="@{/logout}" method="post">
        <input type="submit" value="Sign Out"/>
    </form>
</body>
</html>